As bandwidth and capacity requirements continue to rise, many hyperscale data centers are transitioning to 400G network architectures. Emerging technologies such as machine learning, virtual reality, 5G, and online gaming are driving the need for faster speeds and more advanced fiber connectivity solutions.
Semtrex provides a comprehensive range of cabling and connectivity options specifically designed to support 400G data center deployments.
These solutions typically utilize single-mode fiber to take advantage of its superior bandwidth and long-distance transmission capabilities. Configurations include MPO assemblies — supporting both BASE-8 and BASE-16 architectures — as well as LC and SN connector-based solutions compatible with 400G transceivers, ensuring flexibility and high-performance network design.
LC and MPO connectors have long been the industry standards for fiber connectivity. However, the introduction of the SN connector is reshaping high-speed data center architectures, particularly for 400G and beyond.
The SN interface has already been integrated into modern transceiver specifications such as QSFP-DD and OSFP, which are designed for next-generation 200G, 400G, and 800G data center interconnect (DCI) applications.
The SN connector is a compact, duplex optical connector that utilizes LC-style 1.25mm zirconia ferrules. It has been specifically developed to meet the evolving needs of hyperscale, edge, enterprise, and colocation data centers. By reducing the number of connection points in the optical link, SN connectors enhance optical performance while improving overall network efficiency.
Engineered to provide independent duplex fiber breakout for quad small form-factor pluggable transceivers (QSFP, QSFP-DD, and OSFP), the SN connector offers a more streamlined, reliable, and scalable alternative to traditional MPO-based connectivity. Additionally, SFP-DD transceivers have adopted the SN interface for independent duo-style connectivity, particularly in wireless front-haul deployments.
Beyond transceiver applications, SN connectors significantly increase fiber density within existing cassettes and patch panels. Compared to LC connectors, SN can deliver up to three times greater density, enabling higher fiber capacity without consuming additional rack space.
Below are examples demonstrating how SN connector-based solutions can be deployed within 400G hyperscale network environments.
The uptake of 400G is a key step along the way to the 800G and 1.6T Ethernet future. The right topology today can support the growing data demands of tomorrow.
| Speed | Ethernet Nomenclature | Ethernet Standard IEEE | Medium | Transceiver Form Factor | Connector Interface | Link Reach |
|---|---|---|---|---|---|---|
| 400GbE (400Gb/s) | 400GBASE-SR8 | 802.3cm | Multimode Fiber (@850nm) | OSFP QSFP-DD | MPO (16) MPO (2×12) | OM3 – 70m OM4 – 100m OM5 – 100m |
| 400GBASE-DR4 | 802.3bs | Single-mode Fiber (WDM) | CFP8 OSFP QSFP-DD | MPO 12 SN Connector | OS2 – 500m | |
| 400GBASE-FR4 | 802.3cu | Single-mode Fiber (WDM) | CFP8 OSFP QSFP-DD | LC Duplex | OS2 – 2km | |
| 400GBASE-2FR4 (2 x 200G-FR4) | 802.3bs | Single-mode Fiber (WDM) | QSFP-DD OSFP | CS Connector | OS2 – 2km |
